cc: Add an integration test for what scale we draw with after pinching

cc/test/test_web_graphics_context_3d.cc

Index: cc/test/test_web_graphics_context_3d.cc
diff --git a/cc/test/test_web_graphics_context_3d.cc b/cc/test/test_web_graphics_context_3d.cc
index 9fae995ec6f8d8d1e6b813b9e7d6de23cfeb051f..8e2bb22185ec161392d128304fb841f9f08c8c4c 100644
--- a/cc/test/test_web_graphics_context_3d.cc
+++ b/cc/test/test_web_graphics_context_3d.cc
@@ -67,6 +67,7 @@ TestWebGraphicsContext3D::TestWebGraphicsContext3D()
       last_update_type_(NoUpdate),
       next_insert_sync_point_(1),
       last_waited_sync_point_(0),
+      query_result_available_ext_(1),
       bound_buffer_(0),
       weak_ptr_factory_(this) {
   CreateNamespace();
@@ -357,7 +358,7 @@ void TestWebGraphicsContext3D::getQueryObjectuivEXT(
     GLuint* params) {
   // If the context is lost, behave as if result is available.
   if (pname == GL_QUERY_RESULT_AVAILABLE_EXT)
-    *params = 1;
+    *params = query_result_available_ext_;
 }
 
 void TestWebGraphicsContext3D::getIntegerv(